Power driven rotating card files

Claim 1

A ROTARY CARD FILE COMPRISING A SUBSTANTIALLY CYLINDRICAL FILE CARD RETAINING WHEEL HAVING A HORIZONTAL AXIS AND A PERIPHERAL PORTION FORMING A SEAT FOR FILE CARDS DISPOSED SUBSTANTIALLY RADIALLY WITH RESPECT TO THE WHEEL AXIS WITH FREEDOM OF TILTING WITH RESPECT TO THE TRUE RADIAL POSITION; A BASE SUPPORTING SAID WHEEL FOR ROTATION ABOUT SAID HORIZONTAL AXIS; AN ELECTRIC MOTOR MOUNTED ON SAID BASE, SAID MOTOR HAVING AN ARMATURE WINDING AND A FIELD WINDING, MEANS FOR ELECTRICALLY CONNECTING ONE LEAD OF SAID ARMATURE WINDING TO A POWER LINE, SWITCHING MEANS ON SAID BASE FOR CONTROLLING SAID MOTOR, SAID SWITCHING MEANS INCLUDING AN ACTUATOR, SAID ACTUATOR BEING SHIFTABLE TO A FIRST POSITION CORRESPONDING TO ROTATION OF THE WHEEL IN ONE DIRECTION, TO A SECOND POSITION CORRESPONDING TO ROTATION OF THE WHEEL IN THE OPPOSITE DIRECTION, AND TO AN OFF POSITION, FIRST AND SECOND CONTACT PAIRS, EACH OF SAID CONTACT PAIRS COMPRISING A FIRST CONTACT IN ELECTRICAL CONNECTION WITH A SECOND POWER LINE AND A SECOND CONTACT CONNECTED TO A SECOND LEAD OF THE MOTOR ARMATURE, A MOVABLE CONTACT MEMBER ASSOCIATED WITH EACH CONTACT PAIR, CONNECTING MEANS MECHANICALLY INTERCONNECTING EACH OF SAID MOVABLE CONTACT MEMBERS WITH SAID ACTUATOR, EACH OF SAID MOVABLE CONTACT MEMBERS BEING RESPECTIVELY CONNECTED TO OPPOSITE LEADS OF SAID FIELD, SAID MOVABLE CONTACT MEMBERS BEING IN ENGAGEMENT WITH THE SECOND CONTACT OF EACH PAIR WHEN SAID ACTUATOR IS IN THE OFF POSITION, SAID CONNECTING MEANS BEING EFFECTIVE TO SHIFT THE MOVABLE CONTACT OF ONE PAIR INTO ENGAGEMENT WITH THE FIRST CONTACT OF SAID PAIR WHEN THE ACTUATOR IS SHIFTED TO ITS FIRST POSITION, AND THE MOVABLE CONTACT OF THE OTHER PAIR INTO ENGAGEMENT WITH THE FIRST CONTACT OF THAT PAIR WHEN THE ACTUATOR IS SHIFTED TO THE SECOND POSITION, AND MEANS FOR RETURNING EACH OF SAID MOVABLE CONTACT MEMBERS TO ENGAGEMENT WITH THE SECOND CONTACT OF THE ASSOCIATED CONTACT PAIR WHEN THE MOVABLE CONTACT MEMBER ASSOCIATED WITH THE OTHER CONTACT PAIR IS SHIFTED TO A POSITION IN ENGAGEMENT WITH THE FIRST CONTACT OF THAT PAIR, WHEREBY SAID SWITCHING MEANS IS EFFECTIVE WHEN THE ACTUATOR IS IN SAID FIRST POSITION TO CONNECT THE FIELD WINDING IN SERIES WITH THE ARMATURE WINDING AND ESTABLISH A CURRENT FLOW IN A FIRST DIRECTION THROUGH THE FIELD WINDING, AND SAID SWITCHING MEANS IS FURTHER EFFECTIVE WHEN THE ACTUATOR IS IN THE SECOND POSITION TO CONNECT THE FIELD WINDING IN SERIES RELATIONSHIP WITH THE ARMATURE AND ESTABLISH A CURRENT FLOW THROUGH THE FIELD WINDING IN THE REVERSE DIRECTION, AND SAID SWITCHING MEANS IS ADDITIONALLY EFFECTIVE WHEN THE ACTUATOR IS IN THE OFF POSITION TO DISCONNECT SAID FIELD WINDING FROM SERIES CONNECTION WITH SAID ARMATURE, A SPEED REDUCTION GEAR MOUNTED ON SAID BASE, SAID GEAR BEING DRIVEN BY SAID MOTOR; DRIVE MEANS BETWEEN SAID SPEED REDUCTION GEAR AND SAID WHEEL, AND A RESISTOR IN PARALLEL WITH SAID ARMATURE WINDING FOR DYNAMICALLY BRAKING SAID MOTOR AND THEREBY REDUCING COASTING OF THE WHEEL WHEN SAID ACTUATOR IS MOVED INTO ITS OFF POSITION.